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><DIV
CLASS="TITLEPAGE"
><H1
CLASS="title"
>XXXV. Expect Functions</H1
><DIV
CLASS="PARTINTRO"
><A
NAME="AEN48577"
></A
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="expect.intro"
>简介</A
></H1
><P
>&#13;     This extension allows to interact with processes through PTY. You may
     consider using the <A
HREF="wrappers.expect.html"
><TT
CLASS="literal"
>expect://</TT
>
     wrapper</A
> with the <A
HREF="ref.filesystem.html"
>filesystem
     functions</A
> which provide a simpler and more intuitive interface.
    </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="expect.requirements"
>需求</A
></H1
><P
>&#13;     This module uses the functions of the <A
HREF="http://expect.nist.gov/"
TARGET="_top"
>expect</A
> library.
     You need libexpect version &#62;= 5.43.0.
    </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="expect.installation"
>安装</A
></H1
><P
>&#13;  本 <A
HREF="http://pecl.php.net"
TARGET="_top"
>PECL</A
> 扩展未绑定于 PHP 中。
  安装此 PECL 扩展库的信息可在手册中标题为 <A
HREF="install.pecl.html"
>PECL 扩展库安装</A
>的一章中找到。 更多信息如新版本，下载，源文件，维护者信息以及更新日志等可以在这里找到：
  <A
HREF="http://pecl.php.net/package/expect"
TARGET="_top"
>http://pecl.php.net/package/expect</A
>.
 </P
><P
>&#13;  在 PHP 4 中本 <ACRONYM
CLASS="acronym"
>PECL</ACRONYM
> 扩展的源程序位于
PHP 源程序中的 <TT
CLASS="filename"
>ext/</TT
> 目录下或者在上面的
<ACRONYM
CLASS="acronym"
>PECL</ACRONYM
> 连接中。
  In order to use these functions you must compile PHP with expect support
  by using the <CODE
CLASS="option"
>--with-expect[=DIR]</CODE
> 
  configure option.
 </P
><P
>&#13;  Windows users will enable <TT
CLASS="filename"
>php_expect.dll</TT
> inside
  of <TT
CLASS="filename"
>php.ini</TT
> in order to use these functions.
  在 PHP 4 中本 <ACRONYM
CLASS="acronym"
>DLL</ACRONYM
> 位于
PHP Windows 执行包中的 <TT
CLASS="filename"
>extensions/</TT
> 目录下。
  可以从 <A
HREF="http://www.php.net/downloads.php"
TARGET="_top"
>PHP
下载页面</A
>或者 <A
HREF="http://snaps.php.net/"
TARGET="_top"
>http://snaps.php.net/</A
>
下载此 <ACRONYM
CLASS="acronym"
>PECL</ACRONYM
> 扩展的
<ACRONYM
CLASS="acronym"
>DLL</ACRONYM
> 文件。
 </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="expect.configuration"
>运行时配置</A
></H1
><P
>这些函数的行为受 <TT
CLASS="filename"
>php.ini</TT
> 的影响。</P
><P
>&#13;  In order to configure expect extension, there are configuration options
  in the <A
HREF="configuration.html#configuration.file"
>configuration file</A
> <TT
CLASS="filename"
>php.ini</TT
>.
  <DIV
CLASS="table"
><A
NAME="AEN48615"
></A
><P
><B
>表 1. Expect 配置选项</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><COL><COL><THEAD
><TR
><TH
>名字</TH
><TH
>默认</TH
><TH
>可修改范围</TH
><TH
>Changelog</TH
></TR
></THEAD
><TBODY
><TR
><TD
>expect.timeout</TD
><TD
>"10"</TD
><TD
>PHP_INI_ALL</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>expect.loguser</TD
><TD
>"1"</TD
><TD
>PHP_INI_ALL</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>expect.logfile</TD
><TD
>""</TD
><TD
>PHP_INI_ALL</TD
><TD
>&nbsp;</TD
></TR
></TBODY
></TABLE
></DIV
>
  有关 PHP_INI_* 常量进一步的细节与定义参见<A
HREF="ini.html"
>附录 H</A
>。
 </P
><P
>以下是配置选项的简要解释。</P
><P
>&#13;  <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><A
NAME="ini.expect.timeout"
></A
><CODE
CLASS="parameter"
>expect.timeout</CODE
>
     <A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
></DT
><DD
><P
>&#13;      The timeout period for waiting for the data, when using the
      <A
HREF="function.expect-expectl.html"
><B
CLASS="function"
>expect_expectl()</B
></A
> function.
     </P
><P
>&#13;      A value of "-1" disables a timeout from occurring.
     </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
       A value of "0" causes the <A
HREF="function.expect-expectl.html"
><B
CLASS="function"
>expect_expectl()</B
></A
>
       function to return immediately.
      </P
></BLOCKQUOTE
></DIV
></DD
><DT
><A
NAME="ini.expect.loguser"
></A
><CODE
CLASS="parameter"
>expect.loguser</CODE
>
     <A
HREF="language.types.boolean.html"
><B
CLASS="type"
>boolean</B
></A
></DT
><DD
><P
>&#13;      Whether expect should send any output from the spawned process to stdout.
      Since interactive programs typically echo their input, this usually suffices
      to show both sides of the conversation.
     </P
></DD
><DT
><A
NAME="ini.expect.logfile"
></A
><CODE
CLASS="parameter"
>expect.logfile</CODE
>
     <A
HREF="language.types.string.html"
><B
CLASS="type"
>string</B
></A
></DT
><DD
><P
>&#13;      Name of the file, where the output from the spawned process will be
      written. If this file doesn't exist, it will be created.
     </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
       If this configuration is not empty, the output is written regardless of
       the value of <A
HREF="ref.expect.html#ini.expect.loguser"
>expect.loguser</A
>.
      </P
></BLOCKQUOTE
></DIV
></DD
></DL
></DIV
>
 </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="expect.resources"
>资源类型</A
></H1
><P
>&#13;     <A
HREF="function.expect-popen.html"
><B
CLASS="function"
>expect_popen()</B
></A
> returns an open PTY stream used by
     <A
HREF="function.expect-expectl.html"
><B
CLASS="function"
>expect_expectl()</B
></A
>.
    </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="expect.constants"
>预定义常量</A
></H1
><P
>以下常量由本扩展模块定义，因此只有在本扩展模块被编译到
PHP 中，或者在运行时被动态加载后才有效。</P
><P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><A
NAME="constants.expect.exp_glob"
></A
><TT
CLASS="constant"
><B
>EXP_GLOB</B
></TT
>
     (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     Indicates that the pattern is a glob-style string pattern.
    </P
></DD
><DT
><A
NAME="constants.expect.exp_exact"
></A
><TT
CLASS="constant"
><B
>EXP_EXACT</B
></TT
>
     (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     Indicates that the pattern is an exact string.
    </P
></DD
><DT
><A
NAME="constants.expect.exp_regexp"
></A
><TT
CLASS="constant"
><B
>EXP_REGEXP</B
></TT
>
     (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     Indicates that the pattern is a regexp-style string pattern.
    </P
></DD
><DT
><A
NAME="constants.expect.exp_eof"
></A
><TT
CLASS="constant"
><B
>EXP_EOF</B
></TT
>
     (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     Value, returned by <A
HREF="function.expect-expectl.html"
><B
CLASS="function"
>expect_expectl()</B
></A
>, when EOF is
     reached.
    </P
></DD
><DT
><A
NAME="constants.expect.exp_timeout"
></A
><TT
CLASS="constant"
><B
>EXP_TIMEOUT</B
></TT
>
     (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     Value, returned by <A
HREF="function.expect-expectl.html"
><B
CLASS="function"
>expect_expectl()</B
></A
> upon timeout of
     seconds, specified in value of <A
HREF="ref.expect.html#ini.expect.timeout"
>expect.timeout</A
>
    </P
></DD
><DT
><A
NAME="constants.expect.exp_fullbuffer"
></A
><TT
CLASS="constant"
><B
>EXP_FULLBUFFER</B
></TT
>
     (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     Value, returned by <A
HREF="function.expect-expectl.html"
><B
CLASS="function"
>expect_expectl()</B
></A
> if no pattern have
     been matched.
    </P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="expect.examples"
>范例</A
></H1
><P
>&#13;     This example connects to the remote host via SSH, and prints the remote
     uptime.
    </P
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN48722"
></A
><P
><B
>例 1. Expect Usage Example</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />ini_set </font><font color="#007700">(</font><font color="#DD0000">"expect.loguser"</font><font color="#007700">, </font><font color="#DD0000">"Off"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$stream </font><font color="#007700">= </font><font color="#0000BB">fopen </font><font color="#007700">(</font><font color="#DD0000">"expect://ssh root@remotehost uptime"</font><font color="#007700">, </font><font color="#DD0000">"r"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$cases </font><font color="#007700">= array (<br />&nbsp;&nbsp;array (</font><font color="#0000BB">0 </font><font color="#007700">=&gt; </font><font color="#DD0000">"password:"</font><font color="#007700">, </font><font color="#0000BB">1 </font><font color="#007700">=&gt; </font><font color="#0000BB">PASSWORD</font><font color="#007700">)<br />);<br /><br />switch (</font><font color="#0000BB">expect_expectl </font><font color="#007700">(</font><font color="#0000BB">$stream</font><font color="#007700">, </font><font color="#0000BB">$cases</font><font color="#007700">))<br />{<br /> case </font><font color="#0000BB">PASSWORD</font><font color="#007700">:<br />&nbsp;&nbsp;</font><font color="#0000BB">fwrite </font><font color="#007700">(</font><font color="#0000BB">$stream</font><font color="#007700">, </font><font color="#DD0000">"password\n"</font><font color="#007700">);<br />&nbsp;&nbsp;break;<br /> <br /> default:<br />&nbsp;&nbsp;die (</font><font color="#DD0000">"Error was occurred while connecting to the remote host!\n"</font><font color="#007700">);<br />}<br /><br />while (</font><font color="#0000BB">$line </font><font color="#007700">= </font><font color="#0000BB">fgets </font><font color="#007700">(</font><font color="#0000BB">$stream</font><font color="#007700">)) {<br />&nbsp;&nbsp;print </font><font color="#0000BB">$line</font><font color="#007700">;<br />}<br /></font><font color="#0000BB">fclose </font><font color="#007700">(</font><font color="#0000BB">$stream</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
></DIV
></DIV
><DIV
CLASS="TOC"
><DL
><DT
><B
>目录</B
></DT
><DT
><A
HREF="function.expect-expectl.html"
>expect_expectl</A
>&nbsp;--&nbsp;Waits until the output from a process matches one
  of the patterns, a specified time period has passed, or an EOF is seen
  </DT
><DT
><A
HREF="function.expect-popen.html"
>expect_popen</A
>&nbsp;--&nbsp;Execute command via Bourne shell, and open the PTY stream to
  the process</DT
></DL
></DIV
></DIV
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